@Coog what was it attached to??
It does just sound like nylon tubing.
METRIC & IMPERIAL Flexible Nylon Tube Hose Pneumatic Air Line Tubing 1m 30m 100m | eBay
NYLON TUBE. NYLON TUBE: SUPERFLEX INDUSTRIAL. Restistant To A WIde Range Of Chemicals - Silicon Free - Excellent Abrasion Resistance And Superior Flexibility - Mirror Smooth Inner For Improved Flow.www.ebay.co.uk
Was going to buy a length of it but saw that it was only rated to 70c.
It's a vacuum pipe. As long as you dont tie it to the exhaust it'll be fine.
Or if you wanted metal....dimensions arent a million miles away from brake pipe. Would prob need a clip on the rubber hose ends as brake pipe is a little smaller.